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Research at OU

Engineering

17 Doi, S.; Ata, S.; Kitamura, H.; Murata, M.(Graduate School of Information Science and Technology)
IPv6 Anycast for Simple and Effective Service-oriented Communications
IEEE Communications Magazine (2004)

Many of current definitions in IPv6 anycast in the protocol standard are unclear. We raise several problems and provide possible solutions to these. Based on this background, we present the Anycast Address Resolving Protocol (AARP) to establish TCP connections with a specific anycast address, and then propose a routing protocol for inter-segment anycast. Our proposed architecture makes anycast addresses more useful without (or at most minimum) the need for modifications, extensions to existing applications and/or upper-layer protocols.


18 Hasegawa, Y.; Wada, Y.; Yanagida, S.; Kawai, H.; Yasuda, N.; Nagamura, T. (Graduate School of Engineering)
Polymer Thin Films Containing Eu(III) Complex as Lanthanide(III) Lasing Medium
Applied Physics Letters, 83, 3599-3601 (2003)


19 Hasobe, T.; Imahori, H.; Kamat, P.V.; Fukuzumi, S.
(Graduate School of Engineering)
Quaternary Self-Organization of Porphyrin and Fullerene Units by Clusterization with Gold Nanoparticles on SnO2 Electrodes for Organic Solar Cells
Journal of the American Chemical Society, 125, 14962-14963 (2003)

Novel organic solar cells prepared using quaternary self-organization of porphyrin (donor) and fullerene (acceptor) dye units by clusterization with gold nanoparticles on SnO2 electrodes exhibit the remarkable enhancement of the photoelectrochemical properties relative to the reference systems.


20 Hirai, T.*1,2; Nomura, Y.*2; Komasawa, I.*1, 2
*1(Research Center for Solar Energy Chemistry) *2(Graduate School of Engineering Science)
Immobilization of RuS2 Nanoparticles Prepared in Reverse Micellar System onto Thiol-Modified Polystyrene Particles and Their Photocatalytic Properties
Journal of Nanoparticle Research, 5, 61-67 (2003)

RuS2 nanoparticles, smaller than 3 nm in diameter, were prepared by H2S gas injection into the AOT/isooctane reverse micellar solution containing RuCl3 aqueous solution. The nanoparticle size was found to be independent of the Wo(water content) value of the reverse micellar system, as shown by TEM observation. The recovery and immobilization of the RuS2 nanoparticles from reverse micelles onto thiol-modified polystyrene particles (PSt-SH) were successfully carried out, by the addition of PSt-SH into the reverse micellar solution under conditions of mild stirring. The resulting composites, PSt-RuS2, showed photocatalytic activity for H2 generation from aqueous solution containing 2-propanol and Na2SO3 as sacrificial electron donors.


21 Hyun, S.K.; Ikeda, T.; Nakajima, H.(Institute of Scientific and Industrial Research)
Fabrication of Lotus-type Porous Iron and its Mechanical Properties
Science and Technology of Advanced Materials, 5, 201-205 (2004)


22 Iida, S.; Tsujita, T.; Nagatomi, T.; Takai, Y.(Graduate School of Engineering)
Self-Recovery Function of Sc-O/W(100) System as Schottky Emitter
Surface Science, 543, 1-4 (2003)

The surface characterization of an Sc-O;W(100) system as a Schottky emitter was performed at high temperature. A self-recovery function against surface damage induced by residual gas ion sputtering, which is one of the most important properties required for the stable electron emission from emitters, was confirmed at ?`1500 K, the operating temperature of the emitter. The self-recovery function is caused by the surface segregation of Sc and O atoms from the bulk at high temperature.


23 Ikuno, T.*1; Katayama, M.*1; Kamada, K.*1; Honda, S.*1; Lee, J.-G.*2; Mori, H.*2; Oura, K.*1,2
*1(Graduate School of Engineering)*2(Research Center for Ultra-High Voltage Electron Microscopy)
Insulator-Coated Carbon Nanotubes Synthesized by Pulsed Laser Deposition
Japanese Journal of Applied Physics, 42, L1356-L1358 (2004)

We present a method for synthesizing insulator-coated carbon nanotubes by pulsed laser deposition. Isolated multi-walled carbon nanotubes (MWNTs) were coated with an SiOx thin layer in a multishell form. The product showed that a stoichiometric SiO2 thin layer was uniformly wrapped around a MWNT, and reflected the shape of the MWNT. The thickness of the SiO2 thin layer was precisely controlled in the range from 2 to 28 nm. The insulating property of the product was verified using a template of vertically oriented carbon nanotubes.


24 Imada, Y.; Iida, H.; Ono, S.; Murahashi, S.-I.
(Graduate School of Engineering Science)
Flavin Catalyzed Oxidations of Sulfides and Amines with Molecular Oxygen
Journal of the American Chemical Society, 125, 2868-2869 (2003)

Novel biomimetic, aerobic oxidation with an organocatalyst was performed. The oxidations of organic substrates such as sulfides, secondary amines, N-hydroxylamines, and tertiary amines with molecular oxygen (1 atm) or even in air in the presence of 5-ethyl-3-methyllumiflavinium perchlorate catalyst and hydrazine monohydrate in 2,2,2-trifluoroethanol occurs highly efficiently to give the corresponding oxidized compounds in excellent yields along with water and molecular nitrogen, which are environmentally benign. The TON of the oxidation of sulfides amount to 19,000.


25 Imanaka, N.; Tamura, S.; Mori, A.(Graduate School of Engineering)
Novel Li+ Ion-conductive Solid of LiNO3 with (Gd0.9La0.1)2O3
Electrochemistry, 71, 1039-1041 (2003)

A nobel Li+ ion conducting solid electrolyte with both a high Li+ ion conductivity and a high durability in air, which could not be realized for the conventional materials, has been successfully developed by artificially designing a new type of solid solution of rare earth oxide and lithium nitrate. The features of the present solid electrolyte are preferable to several electronic devices, and especially, this material is greatly expected to be a component of all solid-state lithium rechargeable battery.


26 Imanaka, N.; Ogura, A.; Adachi, G.(Graduate School of Engineering)
Practical Smart CO2 Gas Sensor Applicable for In-situ Real Time Monitoring at Every Emitting Site
Electrochemistry, 71, 14-18 (2003)

A smart carbon dioxide gas sensor has been successfully realized by the conjunction of two type of ion conducting solids with an auxiliary detecting electrode. The present sensor shows a rapid, continuous and theoretical response without any interference with the coexisting gas species. This sensor is greatly expected to contribute to the real time monitoring and the following suppressive operation of carbon dioxide gas emission, which is highly requested in this 21st century as declared in Kyoto COP3.


27  Ito, M.; Oda, Y.; Hara, S.
(Graduate School of Engineering)
Synthesis of c-axis Oriented NaxCo2O4 Thermoelectric Oxide by the Citric Acid Complex Method
Journal of the Japan Society of Powder and Powder Metallurgy, 50, 952-957 (2003)
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